Questions about ISPconfig usage

I am setting up a network at home for hosting a few sites I have.
This is going to be an elaborate network for what I am doing.
I need to know what is the right course of action for using ispconfig for this setup. Is Ispconfig needed for every server? It is not a problem to install and I already have my nameservers and www server setup.

I have some old server hardware. Compaq proliant 1850r's.

I have nameservers that I have setup with the Perfect Debian etch setup and ISPconfig.

I am not hosting from the two name servers ..."ns1 and ns2"
I am hosting from another server "www" and I assume this will be my mail server also.... Three physical machines... All with Debian 4.0 and ispconfig.
I have read about the glue record but it is not sticking like glue...

On my www server I set the nameservers as ns1 and ns2 ....and it will propogate? so that when I create a site on www server the ns1 and ns2 will direct requests automatically?